Semigroup
[计] 半群
🗣️ 情景例句
Yes. It's a lovely day and good enough to travel.
是的，天气很好，旅游是再好不过了。
He's a very hard man to please.
他是一个很难讨好的人。
What's the matter with your foot, Jane?
珍妮，你的脚怎么了？